Profile image
By Alton Parrish (Reporter)
Contributor profile | More stories
Story Views
Now:
Last Hour:
Last 24 Hours:
Total:

Dead Planets Can 'Broadcast' for Up to a Billion Years

% of readers think this story is Fact. Add your two cents.
Planetary cores orbiting distant white dwarf stars emit radio waves that we can detect from Earth,

Astronomers are planning to hunt for cores of exoplanets around white dwarf stars by ‘tuning in’ to the radio waves that they emit.

In new research led by the University of Warwick, scientists have determined the best candidate white dwarfs to start their search, based upon their likelihood of hosting surviving planetary cores and the strength of the radio signal that we can ‘tune in’ to.

 

NGC 2440: Cocoon of a New White Dwarf

See Explanation. Clicking on the picture will download the highest resolution version available.
Credit: H. Bond (STScI), R. Ciardullo (PSU), WFPC2, HST, NASA

Published in the Monthly Notices of the Royal Astronomical Society, the research led by Dr Dimitri Veras from the Department of Physics assesses the survivability of planets that orbit stars which have burnt all of their fuel and shed their outer layers, destroying nearby objects and removing the outer layers of planets. They have determined that the cores which result from this destruction may be detectable and could survive for long enough to be found from Earth.

The first exoplanet confirmed to exist was discovered orbiting a pulsar by co-author Professor Alexander Wolszczan from Pennsylvania State University in the 1990s, using a method that detects radio waves emitted from the star. The researchers plan to observe white dwarfs in a similar part of the electromagnetic spectrum in the hope of achieving another breakthrough.

The magnetic field between a white dwarf and an orbiting planetary core can form a unipolar inductor circuit, with the core acting as a conductor due to its metallic constituents. Radiation from that circuit is emitted as radio waves which can then be detected by radio telescopes on Earth. The effect can also be detected from Jupiter and its moon Io, which form a circuit of their own.

However, the scientists needed to determine how long those cores can survive after being stripped of their outer layers. Their modelling revealed that in a number of cases, planetary cores can survive for over 100 million years and as long as a billion years.

The astronomers plan to use the results in proposals for observation time on telescopes such as Arecibo in Puerto Rico and the Green Bank Telescope in West Virginia to try to find planetary cores around white dwarfs.

Lead author Dr Dimitri Veras from the University of Warwick said: “There is a sweet spot for detecting these planetary cores: a core too close to the white dwarf would be destroyed by tidal forces, and a core too far away would not be detectable. Also, if the magnetic field is too strong, it would push the core into the white dwarf, destroying it. Hence, we should only look for planets around those white dwarfs with weaker magnetic fields at a separation between about 3 solar radii and the Mercury-Sun distance.

“Nobody has ever found just the bare core of a major planet before, nor a major planet only through monitoring magnetic signatures, nor a major planet around a white dwarf. Therefore, a discovery here would represent ‘firsts’ in three different senses for planetary systems.”

Professor Alexander Wolszczan from Pennsylvania State University, said: “We will use the results of this work as guidelines for designs of radio searches for planetary cores around white dwarfs. Given the existing evidence for a presence of planetary debris around many of them, we think that our chances for exciting discoveries are quite good.”

Dr Veras added: “A discovery would also help reveal the history of these star systems, because for a core to have reached that stage it would have been violently stripped of its atmosphere and mantle at some point and then thrown towards the white dwarf. Such a core might also provide a glimpse into our own distant future, and how the solar system will eventually evolve.”

Contacts and sources:

Peter Thorley

University of Warwick

Citation: Survivability of radio-loud planetary cores orbiting white dwarfs.
Dimitri Veras, Alexander Wolszczan. Survivability of radio-loud planetary cores orbiting white dwarfs. Monthly Notices of the Royal Astronomical Society, 2019; 488 (1): 153 DOI: 10.1093/mnras/stz1721

 



Source:
Support BeforeitsNews by trying our natural health products! Join our affiliate program
Order by Phone at 888-809-8385 or online at www.mitocopper.com
Get our Free Ebook, "Suppressed Health Secrets" THEY don't want you to know!

APeX - Far superior to colloidal silver!  Desroys Viruses, Bacteria, Pathogens!
Ultimate Curcumin - Natural pain relief, reduce inflammation and so much more.
Supreme Fulvic - Nature's most important supplement! Vivid Dreams again!
MitoCopper - Bioavailable Copper destroys pathogens and gives you more energy.
Oxy Powder - Natural Colon Cleanser! Cleans out toxic buildup!
B-12 - Supports healthy metabolism, brain function, hormone balance!
Nascent Iodine - Promotes detoxification, mental focus and thyroid health.
Never Wax Your Car Again -
Protects vehicles for years with dazzling shine!
Smart Meter Cover - Reduces Smart Meter radiation! See Video!
Prodovite - The Secret To Healing is in the Blood!

Tactical Laser Blinds
Attackers
Bring Batteries Back
toLife!
New Laser Blinds Attackers Instantly! Bring Dead Batteries Back to life!

US Faces 100 Year Drought
Cut Power Bills by 65%
NASA - US Faces 100 Year Drought! Discovery Can Cut Power Bills by 65%
Report abuse

Comments

Your Comments
Question   Razz  Sad   Evil  Exclaim  Smile  Redface  Biggrin  Surprised  Eek   Confused   Cool  LOL   Mad   Twisted  Rolleyes   Wink  Idea  Arrow  Neutral  Cry   Mr. Green

SignUp

Login

Newsletter

Email this story
Email this story

If you really want to ban this commenter, please write down the reason:

If you really want to disable all recommended stories, click on OK button. After that, you will be redirect to your options page.